Silicone 900CPS

Silicone 900CPS: tyre treatment for predictable and consistent traction

The grip of the tyres is one of the factors that most influences the behaviour of a slot car on track. A poorly treated tyre slips, penalises corner exit, and renders any chassis adjustment meaningless. Silicone 900CPS (ref. MP010-900) is formulated to condition them precisely, providing the right amount of plasticiser without overly softening them or generating deposits that dirty the track.

Main features

• Viscosity 900CPS: a medium-high value that allows for controlled absorption by the rubber, without saturating it or causing excessive runoff.
• Specific formulation for slot tyres: designed to work with the common rubbers in 1/32 and 1/24 scale, both as replacements and original equipment.
• Durable effect: the treatment does not wear off in the first laps; it integrates into the surface of the tyre and maintains grip throughout the session.
• No residue on track: when applied correctly, it does not stain the track or transfer silicone to the circuit, which is essential in club sessions where multiple cars share the same track.

Recommended applications

The viscosity 900CPS places it at a midpoint in the spectrum: denser than light silicones of 100-350CPS —which are mainly used as axle and chassis lubricants— and less dense than formulations of 1,000CPS or higher, designed for tyres that require a more aggressive plasticising. This range makes it especially suitable for:

• Natural or synthetic rubber tyres of medium-low hardness that need to regain their original feel after a period of storage.
• Club racing preparations where repeatable and predictable grip is sought instead of ephemeral traction peaks.
• Enthusiasts who practice on home circuits with different track systems —Scalextric, Ninco, Scaleauto, Carrera— and want a versatile product for their entire fleet of cars.

Behaviour and performance

Unlike some aggressive treatments that overly soften the rubber and accelerate its wear, Silicone 900CPS works on the surface and in the first layers of the tyre without compromising its structure. The result is a higher and more consistent coefficient of friction, translating into cleaner corner exits and a steering response that is more faithful to the controller's corrections.

In cars with inline or sidewinder motors, where the weight distribution over the rear axle varies considerably, a good tyre treatment can make the difference between a car that tightens in corners and one that follows the intended trajectory naturally.

Usage recommendations

• Apply a small amount to the tyre mounted on the axle or on a flat surface, allowing the rubber to absorb the product for several minutes before putting the car on track.
• Avoid excess: with Silicone 900CPS, less is more. A generous application does not improve grip but may create an initial slippery film.
• For very hard or aged tyres, you can repeat the application in cycles of 5-10 minutes until the rubber regains its natural elasticity.
• Do not use it as an axle, chassis, or guide lubricant: for those functions, there are formulations with much lower viscosity.

Frequently asked questions

What is the difference between a 100CPS silicone and a 900CPS silicone?

Viscosity measures the density of the fluid: the higher the CPS, the thicker the silicone. 100CPS formulations are very fluid and are mainly used as lubricants in mechanical parts. The 900CPS is denser, penetrates more slowly and in a controlled manner into the rubber, making it much more effective as a tyre treatment.

Can I use it on urethane tyres?

Urethane tyres have a different composition than natural or synthetic rubber and usually require specific treatments or different absorption times. If you have no prior experience with this type of rubber, first test with a minimal amount on a spare tyre to check the result before applying it to your entire fleet.

Does it stain the track or the circuit?

When applied in the right amount and respecting the absorption time before running, it does not leave visible residues on the track. The common problem of silicones that stain the track usually results from excess product or not waiting long enough before running.

How often should tyres be treated?

It depends on the type of rubber, ambient temperature, and usage intensity. Under normal club conditions, one application before each long session is usually sufficient. On home circuits with shorter sessions, treating the tyres every two or three sessions may be enough.

Is it compatible with tyres of 1/24 scale cars?

Yes, Silicone 900CPS is not limited to any specific scale. It works on any rubber tyre, regardless of whether the car is 1/32 or 1/24.

Silicone 900CPS (MP010-900) is a medium-high viscosity silicone treatment designed for slot car tyres in 1/32 and 1/24 scale. It enhances grip consistency and tyre life, making it suitable for both club racing and home track use. Compatible with rubber tyres used on Scalextric, Ninco, Scaleauto and Carrera track systems. Available at Ministry of Hobby, your specialist in slot cars, scale models and high-end collectibles.